Earth's acceleration due to gravity explained

Velocity changes over time due to acceleration of gravity- FreeScienceStuff

Terminal velocity - Phillips Physics

Terminal velocity is reached when the force of acceleration equals the force of resistance in the form of drag. Gravity produces an acceleration of 9.8 meters/second/second or 9.8 meters/second squared.

Acceleration due to gravity - 1 min.

Objects regardless of mass fall at the same rate due to gravitational acceleration assuming that the resistance of drag is the same for both objects. 

Which hits the ground first - 3 min.